docs: def parse_time_division(self, bytes):
          """Parse the time division found in the header of a MIDI file and
          return a dictionary with the boolean fps set to indicate whether to
          use frames per second or ticks per beat.
  
          If fps is True, the values SMPTE_frames and clock_ticks will also be
          set. If fps is False, ticks_per_beat will hold the value.
          """
          # If highest bit is set, time division is set in frames per second
          # otherwise in ticks_per_beat
          value = self.bytes_to_int(bytes)
          if not value & 0x8000:
              return {'fps': False, 'ticks_per_beat': value & 0x7FFF}
          else:
              SMPTE_frames = (value & 0x7F00) >> 2
              if SMPTE_frames not in [24, 25, 29, 30]:
                  raise TimeDivisionError, \
                      "'%d' is not a valid value for the number of SMPTE frames"\
                       % SMPTE_frames
              clock_ticks = (value & 0x00FF) >> 2
              return {'fps': True, 'SMPTE_frames': SMPTE_frames,
                      'clock_ticks': clock_ticks}